Stapler



FIG. 1 is a rear and left side perspective view of a stapler showing my new design;

FIG. 2 is a right side view of the stapler, as shown in FIG. 1;

FIG. 3 is a left side view of the stapler;

FIG. 4 is a top view of the stapler; and,

FIG. 5 is a front view of the stapler. 

The ornamental design for stapler, as shown and described. 